Does anyone have a good solution for an alternative to the Heliodyne helopak? I like the idea of having my exchanger OUTSIDE of my tank, so when the tank dies I can just plug in another one. I think TACO makes a variation, but does anyone have any other suggestions? I have installed a Heliodyne Helopak so I am familiar with it, I am looking for something for my own personal use. Thanks in advance for all you help, always a pleasure.